NO.PZ2018062016000059
问题如下：
Which of the following statements is most accurate?
选项：
A.
The arithmetic mean is appropriate to estimate the average returns over multiple periods.
B.
The geometric mean is appropriate for assessing past performance.
C.
The geometric mean is always greater than or equal to arithmetic mean.
解释：
B is correct. For reporting historical returns,the geometric mean is more appropriate because it is the rate of growth or return we would have had to earn each year to match the actual,cumulative investment performance.
G的平凡不是等于A*H么
